hdu 3401 Trade

#include  < stdio.h >
#define  N 2001
#define  inf 10000000
#define  max(a,b) ((a)>(b)?(a):(b))
int  f[N][N],q[N],id[N];
int  main() {
    int t,n,maxp,w,ap,bp,as,bs;
    scanf("%d",&t);
    while(t--){
        scanf("%d%d%d",&n,&maxp,&w);
        for(int i=0;i<n;++i){
            scanf("%d%d%d%d",&ap,&bp,&as,&bs);
            for(int j=0;j<=maxp;++j)f[i][j]=-inf;
            if(i<=w)for(int j=0;j<=as;++j)f[i][j]=-ap*j;
            if(i>0)for(int j=0;j<=maxp;++j)f[i][j]=max(f[i][j],f[i-1][j]);
            if (i==0||i<=w) continue;
            for(int j=0,l=0,r=-1;j<=maxp;++j){
                int tmp=f[i-w-1][j]+j*ap;
                while(l<=r&&q[r]<tmp)--r;
                q[++r]=tmp,id[r]=j;
                while(l<=r&&id[l]+as<j)++l;
                f[i][j]=max(f[i][j],q[l]-j*ap);
            }
            for(int j=maxp,l=0,r=-1;j>=0;--j){
                int tmp=f[i-w-1][j]+j*bp;
                while(l<=r&&q[r]<tmp)--r;
                q[++r]=tmp,id[r]=j;
                while(l<=r&&id[l]-bs>j)++l;
                f[i][j]=max(f[i][j],q[l]-j*bp);
            }
        }
        int ans=0;
        for(int i=0;i<=maxp;++i)ans=max(ans,f[n-1][i]);
        printf("%d\n",ans);
    }
    return 0;
}